Whether you're comfortably perched on the porcelain throne or performing wind sprints in a chicken suit, when ya gotta go, ya gotta go. The "Rivals II" cast knows this well, but on the latest episode, they got a big, wet reminder when the game's newest girl made a splash -- literally -- to prove just how determined she was to stay in Thailand.

Cooke's certainly not the first rough-and-tumble "Challenge" competitor to have a bodily function breakdown. After some digging, we came up with four more instances in which Porta Potties simply wouldn't do -- take a look at some of the most embarrassing bathroom-but-not-in-the-bathroom snafus:

He Must Really Want That Car

Cooke isn't the only one who'd rather wet themself than show weakness in a mission. Way back on "Battle Of The Seasons," Timmy was so hell-bent on winning a car during "Hands On Saturn" that he let out a little bit of pee to ensure he wouldn't be DQ'd for removing his hands and feet from a giant ice block. Hey, he was out there for hours -- can you say you wouldn't have done the same?

When Nature Calls, Spiders Answer

While Cooke and Timmy actually benefited from using Mother Earth as a toilet, peeing in the bushes bit Coral in the ass...or, more accurately, the foot. Just before the final "Gauntlet" mission's gun went off, the cast prepped by relieving themselves in nearby foliage. Coral, who's deathly allergic to spiders, was unknowingly bit by one, and later went into anaphylactic shock partway through the course. In the "Battle Scars" Special, she admitted her physical breakdown and ultimate disqualification were consequences of her unconventional squat-spot. Happens to the best of us...

Now That's Laying An Egg

Watching yourself on TV in a chicken suit is probably pretty humiliating, but the memory that one of the shared costumes was spilling over with David's dookie is the stuff of PTSD. On "The Inferno," Teams Real World and Road Rules were challenged with using their mouths to fill up bird feeders with super worms while dressed like poultry, and to add insult to injury, the cast soon discovered that Team Red's laziest player couldn't be bothered to take off the suit before letting his bowels explode. Pukeagonia suddenly looks like paradise.

There's No Good Place To Puke In Prague

"The Challenge" is no stranger to gross-out missions and the vom that accompanies them, but when Sarah began blowing chunks out of nowhere during the "Cutthroat" final, it was unlike anything we'd seen. Challengers have chowed down on ox's blood, giant chili peppers and eyeballs across the history of the competition, but none of that ever led to anything like this.

+ What did we miss? Leave more memories of bodily function mishaps in the comments!